#include<stdio.h>
int main (void)
{
    int choice,i;
    double price;
    printf("[1] apple\n");
    printf("[2] pear\n");
    printf("[3] orange\n");
    printf("[4] grape\n");
    printf("[0] exit\n");
    for(i=1;i<=5;i++)
    {
        scanf("%d",&choice);
        if(choice==0)
        break;
        switch(choice)
        {
            case 1:price = 3.00;break;
            case 2:price = 2.50;break;
            case 3:price = 4.10;break;
            case 4:price = 10.20;break;
            default:price = 0.00;break;
        } 
        printf("price = %0.2f\n",price);
    }
    return 0;
}
